package com.itheima.interceptors;

import com.itheima.utils.JwtUtil;
import com.itheima.utils.ThreadLocalUtil;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import java.util.Map;

import static com.itheima.constants.RedisConstant.USER_JWT_TOKEN;

@Component
public class LoginInterceptor implements HandlerInterceptor {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//        令牌验证
        String token = request.getHeader("Authorization");
        //        验证token
        try {
            Map<String, Object> claims = JwtUtil.parseToken(token);
//            String username = (String) claims.get("username");
            //读取redis中的token
            String jwtToken = stringRedisTemplate.opsForValue().get(token);
            if (jwtToken == null){
                throw new RuntimeException();
            }

//            把业务数据存储到ThreadLocal中
            ThreadLocalUtil.set(claims);
//            放行
            return true;
        } catch (Exception e) {
            /*http响应状态码为401*/
            response.setStatus(401);
//            不放行
            return false;
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //清空ThreadLocal中的数据
        ThreadLocalUtil.remove();
    }
}
